Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/ECPMH/CMCIT.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9281-CMCIT.ps) >>/Users/jc/w/tmp/Tune-9281-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ECPMH/CMCIT.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-9281-CMCIT.abc 143 ABC music file with the extracted tune(s)
Tune-9281-CMCIT.ps 6 PostScript
Tune-9281-CMCIT.txt 143 Plain-text file with the extracted tune(s)
Tune-9281-get.log 3965 Log file, useful mostly for debugging
Tune-92810-get.log 10106 Log file, useful mostly for debugging
Tune-92812-get.log 2722 Log file, useful mostly for debugging
Tune-92814-get.log 4490 Log file, useful mostly for debugging
Tune-92815-get.log 5304 Log file, useful mostly for debugging
Tune-92817-get.log 3686 Log file, useful mostly for debugging
Tune-92818-get.log 6264 Log file, useful mostly for debugging
Tune-92819-get.log 4792 Log file, useful mostly for debugging
These files should be available for 24 hours.